All Textbook Topics - Forces and Motion - Friction, Lubrication and Viscosity - Friction acts in the opposite direction to motion
Friction acts in the opposite direction to motion
Friction is a force that acts in the opposite direction to the motion of an object.
Here are some examples:
- In the diagram below, you can see the car is rolling to the right, and the friction forces are acting to the left.
![](https://cdn.figureoutphysics.com/text/1590961820mGlx1eO0YyXWCfVTrPZvRKkjcQMa4J.png)
- In the diagram below, you can see that the car is rolling down the slope, so the friction forces are acting up the slope.
![](https://cdn.figureoutphysics.com/text/1590961820LCO9tqyWsg8NPfEjRVwXiU1ozKIhbp.png)
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